Syntax

Description

t = gputimeit(F) measures the typical time (in seconds) required to run the function specified by the function handle F. The function handle accepts no external input arguments, but can be defined with input arguments to its internal function call.

t = gputimeit(F,N) calls F to return N output arguments. By default, gputimeit calls the function F with one output argument, or no output arguments if F does not return any output.

Examples

Measure the time to calculate sum(A.' .* B, 1) on a GPU, where A is a 12000-by-400 matrix and B is 400-by-12000.

A = rand(12000,400,'gpuArray');
B = rand(400,12000,'gpuArray');
f = @() sum(A.' .* B, 1);
t = gputimeit(f)

0.0026

Compare the time to run svd on a GPU, with one versus three output arguments.

X = rand(1000,'gpuArray');
f = @() svd(X);
t3 = gputimeit(f,3)

1.0622

t1 = gputimeit(f,1)

0.2933

See Also

gpuArray | wait